/Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassObserverRegistry.h
A wrapper type for aTArrayto support having map-of-arrays UPROPERTY members inFMassEntityObserverClassesMap
[USTRUCT](Programming/UnrealArchitecture/Reference/Structs)() struct FMassProcessorClassCollection
TArray<TSubcla...
ClassCollection